﻿<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>博客园-淡泊明志，宁静致远-随笔分类-数据库</title><link>http://www.cnblogs.com/nyxuwen/category/77492.html</link><description>程序爱好者</description><language>zh-cn</language><lastBuildDate>Sun, 18 May 2008 08:51:12 GMT</lastBuildDate><pubDate>Sun, 18 May 2008 08:51:12 GMT</pubDate><ttl>60</ttl><item><title>Sql server一些常见性能问题的总结</title><link>http://www.cnblogs.com/nyxuwen/archive/2007/12/26/1015821.html</link><dc:creator>许文</dc:creator><author>许文</author><pubDate>Wed, 26 Dec 2007 09:16:00 GMT</pubDate><guid>http://www.cnblogs.com/nyxuwen/archive/2007/12/26/1015821.html</guid><wfw:comment>http://www.cnblogs.com/nyxuwen/comments/1015821.html</wfw:comment><comments>http://www.cnblogs.com/nyxuwen/archive/2007/12/26/1015821.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/nyxuwen/comments/commentRss/1015821.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/nyxuwen/services/trackbacks/1015821.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 1.对查询进行优化，应尽量避免全表扫描，首先应考虑在where及orderby涉及的列上建立索引。2.应尽量避免在where子句中对字段进行null值判断，否则将导致引擎放弃使用...&nbsp;&nbsp;<a href='http://www.cnblogs.com/nyxuwen/archive/2007/12/26/1015821.html'>阅读全文</a><img src ="http://www.cnblogs.com/nyxuwen/aggbug/1015821.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://nyxuwen.cnblogs.com/" target="_blank">许文</a> 2007-12-26 17:16 <a href="http://www.cnblogs.com/nyxuwen/archive/2007/12/26/1015821.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>如何进行查询语句的优化</title><link>http://www.cnblogs.com/nyxuwen/archive/2006/12/15/593094.html</link><dc:creator>许文</dc:creator><author>许文</author><pubDate>Fri, 15 Dec 2006 03:30:00 GMT</pubDate><guid>http://www.cnblogs.com/nyxuwen/archive/2006/12/15/593094.html</guid><wfw:comment>http://www.cnblogs.com/nyxuwen/comments/593094.html</wfw:comment><comments>http://www.cnblogs.com/nyxuwen/archive/2006/12/15/593094.html#Feedback</comments><slash:comments>6</slash:comments><wfw:commentRss>http://www.cnblogs.com/nyxuwen/comments/commentRss/593094.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/nyxuwen/services/trackbacks/593094.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 在我的项目中出现这样一个复杂的查询语句,我写成了存储过程,但还是不能进行查询的优化.请教大家如何理解这段SQL语句的执行过程和顺序.谢谢1.第一张表的关键字段selectsellid,drugid...&nbsp;&nbsp;<a href='http://www.cnblogs.com/nyxuwen/archive/2006/12/15/593094.html'>阅读全文</a><img src ="http://www.cnblogs.com/nyxuwen/aggbug/593094.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://nyxuwen.cnblogs.com/" target="_blank">许文</a> 2006-12-15 11:30 <a href="http://www.cnblogs.com/nyxuwen/archive/2006/12/15/593094.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>处理数据库中的空值和布尔值</title><link>http://www.cnblogs.com/nyxuwen/archive/2006/12/07/585338.html</link><dc:creator>许文</dc:creator><author>许文</author><pubDate>Thu, 07 Dec 2006 06:52:00 GMT</pubDate><guid>http://www.cnblogs.com/nyxuwen/archive/2006/12/07/585338.html</guid><wfw:comment>http://www.cnblogs.com/nyxuwen/comments/585338.html</wfw:comment><comments>http://www.cnblogs.com/nyxuwen/archive/2006/12/07/585338.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/nyxuwen/comments/commentRss/585338.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/nyxuwen/services/trackbacks/585338.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;对于初学程序的程序员们来说,Empty和NULL是两个容易搞错的两个数据类型.尤其在数据库中读出字段的数据.对于空值的验证....&nbsp;&nbsp;<a href='http://www.cnblogs.com/nyxuwen/archive/2006/12/07/585338.html'>阅读全文</a><img src ="http://www.cnblogs.com/nyxuwen/aggbug/585338.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://nyxuwen.cnblogs.com/" target="_blank">许文</a> 2006-12-07 14:52 <a href="http://www.cnblogs.com/nyxuwen/archive/2006/12/07/585338.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>比较查询两个查询结果相同的查询语句的效率</title><link>http://www.cnblogs.com/nyxuwen/archive/2006/12/05/581600.html</link><dc:creator>许文</dc:creator><author>许文</author><pubDate>Tue, 05 Dec 2006 01:36:00 GMT</pubDate><guid>http://www.cnblogs.com/nyxuwen/archive/2006/12/05/581600.html</guid><wfw:comment>http://www.cnblogs.com/nyxuwen/comments/581600.html</wfw:comment><comments>http://www.cnblogs.com/nyxuwen/archive/2006/12/05/581600.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/nyxuwen/comments/commentRss/581600.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/nyxuwen/services/trackbacks/581600.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 下面有两条查询记录条数相同的SQL语句，并给出了查询执行计划。但不知道如何来读懂这些内容，请大侠们指教。俩条SQL语句的内容如下：得出的结果都是39条，1SET&nbsp;STATISTICS&n...&nbsp;&nbsp;<a href='http://www.cnblogs.com/nyxuwen/archive/2006/12/05/581600.html'>阅读全文</a><img src ="http://www.cnblogs.com/nyxuwen/aggbug/581600.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://nyxuwen.cnblogs.com/" target="_blank">许文</a> 2006-12-05 09:36 <a href="http://www.cnblogs.com/nyxuwen/archive/2006/12/05/581600.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>ASP存储过程在开发中的应用分析。</title><link>http://www.cnblogs.com/nyxuwen/archive/2006/12/01/579243.html</link><dc:creator>许文</dc:creator><author>许文</author><pubDate>Fri, 01 Dec 2006 10:01:00 GMT</pubDate><guid>http://www.cnblogs.com/nyxuwen/archive/2006/12/01/579243.html</guid><wfw:comment>http://www.cnblogs.com/nyxuwen/comments/579243.html</wfw:comment><comments>http://www.cnblogs.com/nyxuwen/archive/2006/12/01/579243.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/nyxuwen/comments/commentRss/579243.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/nyxuwen/services/trackbacks/579243.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 需求：用于实现省市区三级下拉菜单（简化过程，提高重用）&nbsp;&nbsp;目的：省全部显示，市根据省ID进行显示，区根据省，市ID进行显示使用SQL实现：组合SQL的过程&nbsp;...&nbsp;&nbsp;<a href='http://www.cnblogs.com/nyxuwen/archive/2006/12/01/579243.html'>阅读全文</a><img src ="http://www.cnblogs.com/nyxuwen/aggbug/579243.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://nyxuwen.cnblogs.com/" target="_blank">许文</a> 2006-12-01 18:01 <a href="http://www.cnblogs.com/nyxuwen/archive/2006/12/01/579243.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>存储过程在ASP开发中的应用</title><link>http://www.cnblogs.com/nyxuwen/archive/2006/11/27/574282.html</link><dc:creator>许文</dc:creator><author>许文</author><pubDate>Mon, 27 Nov 2006 11:54:00 GMT</pubDate><guid>http://www.cnblogs.com/nyxuwen/archive/2006/11/27/574282.html</guid><wfw:comment>http://www.cnblogs.com/nyxuwen/comments/574282.html</wfw:comment><comments>http://www.cnblogs.com/nyxuwen/archive/2006/11/27/574282.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/nyxuwen/comments/commentRss/574282.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/nyxuwen/services/trackbacks/574282.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 存储过程在开发项目中的应用主&nbsp;&nbsp;&nbsp;题：讨论存储过程在开发过程中的应用参与人员：公司开发人员和对数据库感兴趣的同事X&nbsp;XX：许国英目&nbsp...&nbsp;&nbsp;<a href='http://www.cnblogs.com/nyxuwen/archive/2006/11/27/574282.html'>阅读全文</a><img src ="http://www.cnblogs.com/nyxuwen/aggbug/574282.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://nyxuwen.cnblogs.com/" target="_blank">许文</a> 2006-11-27 19:54 <a href="http://www.cnblogs.com/nyxuwen/archive/2006/11/27/574282.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>ASP调用存在过程</title><link>http://www.cnblogs.com/nyxuwen/archive/2006/09/11/xuwen.html</link><dc:creator>许文</dc:creator><author>许文</author><pubDate>Mon, 11 Sep 2006 01:42:00 GMT</pubDate><guid>http://www.cnblogs.com/nyxuwen/archive/2006/09/11/xuwen.html</guid><wfw:comment>http://www.cnblogs.com/nyxuwen/comments/500663.html</wfw:comment><comments>http://www.cnblogs.com/nyxuwen/archive/2006/09/11/xuwen.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/nyxuwen/comments/commentRss/500663.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/nyxuwen/services/trackbacks/500663.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;网上找了相关ASP调用存储过程的例子，但要不尽人意。完了最后，不知如何下手,&nbsp...&nbsp;&nbsp;<a href='http://www.cnblogs.com/nyxuwen/archive/2006/09/11/xuwen.html'>阅读全文</a><img src ="http://www.cnblogs.com/nyxuwen/aggbug/500663.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://nyxuwen.cnblogs.com/" target="_blank">许文</a> 2006-09-11 09:42 <a href="http://www.cnblogs.com/nyxuwen/archive/2006/09/11/xuwen.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item></channel></rss>